The Analysis And Design Of Data Access Service In Transmission And Distribution Grid Analysis Software Applied WCF

Transmission and distribution grid is an important part of electric power system, which is in charge of transmitting and distributing electric power. The security and stability of the grid will directly influence the development of people's living standard and even the entire national economy. Transmission and distribution grid has many nodes, wide range and a large amounts of data, and the system planning, operation maintenance, simulaiton research or other study of the grid are all rely on the kinds of analyses and calculations. Thus, it's difficult to complete them only by manual work. Therefore, combining the practical situation of the current power grid to design and develop a new type of grid analysis platform with strong universality, good expansibility and high interaction ability is great significant.In order to improve the universality, expandability and interactivity of grid analysis softwares, model the electric power resources information hierarchically by following the Common Information Model in IEC61970 standard; Design the data access interface of the paltform by following the Component Interface Specification in IEC61970 standard; Establish the C/S communication of the paltform by using the Windows Communication Foundation of Microsoft. First of all, summarized the content of CIM and CIS, and according to the analysis demand of the actual power grid, put forward the platform basic architecture used the model of thin client(C/S model), and illustrated the platform's database, data access interface and the communicaiton successively. Secondly, analysed and designed the data access interfaces according to the IEC61970 content order in detailed, including Common Services, Generic Data Access, High Speed Data Access. Finally, elaborated how to establish the C/S communication of the paltform by using the WCF.The prototype programs of data access and communication as well as the client and server forms application were written by c # in.NET platform of Microsoft Visual Studio 2013, and then connected to the databases, including Memory Database(Fast DB) and Historical Database(Microsoft SQL Server 2008). Next, I edited the structure data of the actual distribution network in a given area by the Client. The editing processes showed that the Client can rapidly and accurately query and update the data which stored in the Server. The correctness and the effectiveness of data access service components were verified by the results.